Freewheel brake hub driven by a motor mounted in the driving wheel



Sept. 5, 193 v s; STEINLEIN El AL 2,171,311.

FREEWHEEL BRAKE HUB "DRIVEN BY MOTOR MOUNTED IN THE DRIViNG WHEEL Fil ed Nov. 4. 1938 Inventors W W'fM -HM Patented Sept. 5, 1939 UNITED STATES PATE T (OFFICE FREEWHEEL BRAKI HUB DRIVEN BY A MO- TOR MOUNTED IN DRIVING WHEEL Gustav Stelnlein', emu, Mainberg, near Schweiniurt, and Ludwig Bruckmoser, Schwelnfart, Germany Application November. 4, 1938, Serial no. 238,726

In Germany December 10, 1937 The present invention relates to improvements in a free-wheel brake hub for a-bicycle driven by a motor mounted on the driving wheel of 7 said bicycle. In the construction disclosed and claimed in our co-pending application $erial No. 189,420, filed February 8, 1938, the re-acting torque of the motor is resiliently transmitted to a leg of the stationary frame fork by an inter-.

mediate member, resiliently loaded by .said reacting torque. This intermediate member is non-rotatably connected to that part of the free- I ence ofthe hub sleeve, and the resiliently loaded member for transmitting the motor re-acting torque to the bicycle frame is rigidly connected directly upon the peripheral surface of said brake bearing. cone by means of a sleeve-like portion fixedlyv embracing said surface. The motor and gear casing enclosing the hub is mounted on this sleeve-like portion to oscillate thereabout.

In this manner the length of the transmittingand connectingdevice between the bearing cone and the bicycle frame is reduced and the construction of this device is simplified, so that the pins which by way of the slot provided in the end of the fork project into the recesses of the brake arm may be reinforced whereby favorable influence upon the reliability oi operation is eifected.

In the accompanying drawing a section through one constructionaccording to'the inven-' tion is shown by way of example.

Upon the axle ll of the driving wheel is mounted the free-wheel brake hub, comprising a driving body I 2, which may be driven by way of a sprocket wheel I 3 from the pedal crank; Mounted upon the circumference of the driving body I! is a free-wheel clutch, comprising a con pling sleeve ll, screwed upon said body. The hub sleeve I! may be coupled to said sleeve l4 and in turn' to the driving body l2, and the sprocket i3 duringdrive. Initial back-pedalling operation moves the sleeve H to the left as a result of the threaded interengagement. of said sleevel4 and the driving body It, and causes the drive to be disconnected and free-wheeling to come into play. Further back-pedalling causes application of the brake. The brake comprises a bearing and brake cone l'l non-rotatably fixed upon the axle H, and forming the station- '6 ary part of the free-wheel hub, a' lengthwise slit brake sleeve l5, capable ofbeing expanded, and a slidable expanding and coupling cone 16, which is connected to the coupling sleeve I4 by means of claws 35. These claws 35 are maintained in10 inter-engagement by means of a sprung ring 36, I so that during drive the vdisplaceable conefli is withdrawn from expanding engagement withthe brake sleeve l5. The coupling cone has a conical surface engagement with the right hand 5 end of the brake sleeve H3 at 37. 'To hold this brake sleeve against rotation, said sleeve has a pair of d ametrically arranged dogs 39, projecting into corresponding slots 40 respectively of the stationary cone il. j

Upon back-pedalling operations, beyond the initial stage above referred to, the resultant rotation of the driving body i2-causes axial movement of the coupling sleeve M to the left due to its threaded engagement with said driving 25 body. Due to the conical end engagement of the brake sleeve IS with the coupling cone H5 at 31, the axial movement of the coupling sleeve M to the left will expand said brake sleeve in position to hold the hub sleeve 8 against rotation. 5

The free wheel hub brake as so far described is of known construction, and the details and operation thereof may be similar to those shownin the Winkler Patent No. 2,066,504,issued January5,1937.

As a feature of the present invention, a portion of the bearing cone H 'is'enlarged in outer diameter in such-a manner, that it projects slightly radiallyoutwardly beyond the outer clrcumference of the hub sleeve II. -A sleeve 2554b extending over the hub sleeve If, is non-rotatably fixed upon the said portionof the bearing cone I! by clamping, press fitting or wedging notshown in the drawing, or by any other means.

The free end of an arm or lever 26 integral with 46 I or otherwise rigidly connected to the sleeve or sleeve-like portion 25-at1 the other, and of said lever, extends into-the gear casing 22 and bears, I

in both directions of rotation, against this casing by means of resilient members such as springs 50 21. The casing 22 is relatively rotatably mounted on the one hand upon the peripheral surface of a I the hub sleeve l8 by means of ball bearings and on the other hand upon the sleeve 25 and encloses the motor (not shown), which is'deslrably 66 I of the internal combustion type, and which is mounted in said casing by any suitable means. In this manner the re-acting torque of the motor is elastically transmitted to the bearingand expanding cone IH'rom which this torque and the torque of the braking couple are transmitted to the bicycle bar frame a by means of the brake arm 3| mounted upon pins 28 of the cone l1 and having U-shaped holding claw 33. This claw straddles the bicycle bar frame 34a which latter has the fork end 34. The brake arm 3| also carries the chain-tensioning appliance.

The motor drive is transmitted, by means of an intermediate gear, to a gear wheel 2| rigidly fixed upon the hub sleeve. A flange Is to which the spoke drum Isa is welded or connected in any other manner, is, by means of a wedge, nonrotatably fixed upon the hub sleeve.

The new arrangement for transmitting the motor re-action moment and the'moment of the braking couple is substantially strengthened'with regard tothe construction shown in our abovementioned co-pending application 'Ser. No.

189,420. The diameter of the brake cone I1 is enlarged over the circumference of the hub sleeve l8 andthe arm or lever 26 is rigid with the sleeve 25, which is non-rotatably fixed upon the circumference-surface of the said-cone l1. Consequently the pins 28, extending through the end of the-fork ill-into the recesses of the brake arm 3.l,-.may be shortened and made of larger cross section, ;so that the connection to the frame warrants greater reliability.

Owing to the resilient support of thecasing 12 the motor may be started by the pedal cranks without jerking.

What we claim is:

1. In a bicycle of the type having a vehicle frame and a motor for driving said bicycle, a free wheel brake hub mounted on the axle of the driving wheel of the'bicycle, and comprising a hub sleeve, and a stationary brake part with its outer circumference extending radially outwardly beyond the outer periphery of said'hub sleeve, a lever having one end aflixed against rotation to the outer circumference of said brake part, a casing for said motor enclosing at least a portion of said brake hub, and mounted for oscillatory movement substantially about the axis of said brake hub, said casing receiving the reactive torque stresses of said motor, resilient means between said casing and said lever for resiliently transmitting the reactive stresses of said motor from said casing to said lever and in turn to said stationary part, and means fortransmitting these stresses from said stationary partto the bicycle frame. I

2. In a bicycle of the type having a vehicle frame and a motor for driving said bicycle, a free-wheel brake hub mounted on the axle of the driving wheel of said bicycle, and comprising a hub sleeve, and a stationary brake part with its outer circumference extending radially outwardly beyond the outer periphery'of said hub sleeve, a lever having a sleeve-like portion embracing, the outer circumference of said brake part, and aflixed thereto against rotation, a casing for said motor, rotatably mounted upon said sleeve-like portion for oscillatory movement thereabout, and receiving the reactive torque stresses of said motor, resilient means between said casing and said lever forresiliently transmitting the reactive torque stresses of said motor from said casing to said lever and in turn to said stationary part, and means for transmitting these stresses from said stationary part to the bicycle frame.

3-. In a bicycle of the type having a vehicle frame and a motor for driving said bicycle, a freewheel brake hub mounted on theQaxle of the driv ing wheel of said bicycle, and comprising a hub sleeve, and. a stationary brake part with its outer circumference extending radially'outwardly beyond the outer periphery of said hub sleeve, a lever having a sleeve-like portion embracing the outer circumference of said brake part, and

- aflixed thereto against rotation, a casing for said motor, rotatably mounted upon said sleeve-like portion for oscillatory movement thereabout,

and receiving the reactive "torque stresses of said motor, resilient means between said casing and said lever for resiliently transmitting the reactive torque stresses of said motor from said casing to said lever and in turn to said stationary part, means for transmitting these stresses from said stationary part to the bicycle frame, an annular flange affixed to said hub sleeve for rotation therewith, and a spoke drum fixed to said annular flan e. 1'

4. In a bicycle having a vehicle frame and a motor for driving said bicycle, a free-wheel brake hub mounted on theaxle of the driving wheel of the bicycle, and comprising 'a hub sleeve, and a stationary brake part with its outer periphery extending radially outwardly beyond the outer periphery of said hub sleeve, a lever having one end aflixed against rotation to the outer periphery of said brake part, resilient means between the motor and said lever for resiliently transmitting the reactive torque of'the motor tosaid lever and in. turn to said stationary part, and means for tran s-v mitting these stressesfrom said stationary part:

to the bicycle frame.

GUSTAV STEINLEIN. 'LUDWIG BRUCKMQSER. 

